The only automated way of doing this I can think of is:- copy whole drawing to a new, empty document- in that document, rename 'object1' to 'object2'- copy entire drawing back into original document- delete pasted drawing

On a side note: layers are generally intended to structure entities with a similar function together (e.g. all center lines are on one layer).Layers are not meant for grouping objects - that's what blocks are for.In your example, I would recommend to have only one layer hierarchy for all objects (e.g. all layers below 'Object1').Then group each object into a separate block named 'objectX'.

caigner wrote:The simple way would be to copy & paste the layer structure

with the background information from Andrew in mind - how about to create a template layer list to fit your needs?If you invest the time to pre-design a layer list with - let say - 20 Objects(?) you could use them directly out of the Library. If you then only need 12 Objects - so what - just delete the rest in the list. Check this out and maybe you can customize it to your needs ...viewtopic.php?f=47&t=1992

Or you could also prepare a Drawing Template with the predefined Layer List ......

andrew wrote:The only automated way of doing this I can think of is:- copy whole drawing to a new, empty document- in that document, rename 'object1' to 'object2'- copy entire drawing back into original document- delete pasted drawing

I guess I can do that. I'll give it a try.

andrew wrote:On a side note: layers are generally intended to structure entities with a similar function together (e.g. all center lines are on one layer).Layers are not meant for grouping objects - that's what blocks are for.In your example, I would recommend to have only one layer hierarchy for all objects (e.g. all layers below 'Object1').Then group each object into a separate block named 'objectX'.

Layers have an advantage over blocks: I can hide/unhide them easily. That makes it very comfortable to work with them.Can I do that also with blocks?

O do a lot of assembly drawing, where I construct all the parts on one "paper". I put each part on its own layer so I can easily hide/unhide it.That's why I came up with that layer-approach.

with the background information from Andrew in mind - how about to create a template layer list to fit your needs?If you invest the time to pre-design a layer list with - let say - 20 Objects(?) you could use them directly out of the Library. If you then only need 12 Objects - so what - just delete the rest in the list. Check this out and maybe you can customize it to your needs ...viewtopic.php?f=47&t=1992

Or you could also prepare a Drawing Template with the predefined Layer List ......

It's definitely a way to solve my "problem".

I didn't know that there is such a thing as a template layer list. I only knew of drawing templates.

caigner wrote:Layers have an advantage over blocks: I can hide/unhide them easily. That makes it very comfortable to work with them.Can I do that also with blocks?

Yes, but only in QCAD and the on/off status will not be saved (an unfortunate restriction of the DXF/DWG format).In the future it might actually also be possible to save the on/off status of blocks (through XData).